Installing Multiplexers
800-357-104-01, Revision 01
52
September 29, 2000
HMS-357 List 4 and List 5
HXU
-36
9
I
NSTALLING
THE
HXU-369 M
ULTIPLEXER
C
ARD
Figure 33.
Installing an HXU-369
If you have already installed the HXU-369 multiplexer at this point as outlined in
Cables—OC-3 (Dual Subtended STS-1 Multiplexers)” on page 16
, proceed to
if you plan to install a fan; otherwise, proceed to
“Installing a Line Unit (HLU)” on
.
If you are installing an HXU-369 in a Wideband System 3190 that has an legacy multiplexer
(HXU-357, HXU-358, or HXU-359), contact Customer Service.
Step
Procedure
Installer Check
ü
ü
ü
ü
Whenever installing or removing units from the HMS-357 chassis, be sure to wear an
antistatic wrist strap and connect it to the ESD strap input.
1
If you have not already done so, unscrew the two hold-down lugs on each side of the chassis front
cover. The cover folds down.
H
2
Plug your ESD strap into the ESD input on the front of the chassis.
H
3
Align the edges of the HXU-369 with the slot guides in the multiplexer tray.
H
4
Grasping the card eject tabs, gently push the card halfway into the bay.
•
Insert the fiber-optic cable connectors into transmit (TX) and receive (RX) receptacles on the
piggybacked card.
•
Route the cables through the inverted T slots in the HXU-369 front panel. The inverted T slots
provide a method of maintaining the correct cable bend ratio.
•
The cables are then routed to the left of the multiplexer tray and exit the tray via the large access
hole on the left side of the tray.
H
5
Grasping the card eject tabs, gently push the card the remainder of the way into the bay.
H
6
Firmly press in on the tabs until the card snaps into place.
The LEDs flash momentarily. The Power LED and Active LED on the active multiplexer remain
illuminated. The LEDs on the inactive (standby) multiplexer should be off, except for the Power LED.
H
MUX card
ESD strap input
Card eject tab
